Highly scalable aggregate computations in cyber-physical systems: physical environment meets communication protocols

Tovar, Eduardo; Andersson, Björn; Pereira, Nuno; Alves, Mário; Prabh, K. Shashi; Pacheco, Filipe

http://hdl.handle.net/10400.22/3937

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In this paper, we focus on large-scale and dense Cyber- Physical Systems, and discuss methods that tightly integrate communication and computing with the underlying physical environment. We present Physical Dynamic Priority Dominance ((PD)2) protocol that exemplifies a key mechanism to devise low time-complexity communication protocols for large-scale networked sensor systems. We show that using this mechanism, one can compute aggregate quantities such as the maximum or minimum of sensor readings in a time-complexity that is equivalent to essentially one message exchange. We also illustrate the use of this mechanism in a more complex task of computing the interpolation of smooth as well as non-smooth sensor data in very low timecomplexity.